{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-1mgqtydn","versions":[{"created_at":"2026-06-13T16:16:23Z","element_count":83,"note":"5軸GA polish 45->95 by M5 (autonomous)","saved_by":"mcp","sha256":"3979a9daeadaa5a9073afaf333bfe94af3b4ab759797b6a85714c4b80a67ef9f","version":3},{"created_at":"2026-06-13T16:09:25Z","element_count":88,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"6732bba79dfa1197af24077e99949903ed755758672e099e80e29bd34dc8448c","version":2},{"created_at":"2026-06-13T16:09:24Z","element_count":88,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}